The Purple Line Coalition in Suburban Maryland: Why TOD Is Not Enough

June 25, 2013

Transit oriented development has become the holy grail of land use and transportation planners. The logic of concentrating both residential and commercial growth at transit stations — especially rail transit stations — is compelling and has ample empirical support. There is also evidence that transit accessibility increases property values near stations and that mixed use, high density development near stations increases transit ridership.

But investments in transit are designed to move riders through a transit corridor, thus the success of transit investments should be measured at the corridor, not the station, level. In this presentation, Professor Gerrit Knaap, director of the National Center for Smart Growth at the University of Maryland, introduced the newly formed Purple Line Corridor Coalition.

The goal of the coalition is to assure that investments in the purple line transit corridor achieve more than transit-oriented development but serve as a stimulus for sustainable and equitable economic development throughout the corridor without displacing affordable housing or small businesses.

PowerPoint presentation (ppt)

PDF of PowerPoint presentation (pdf)

Gerrit Knaap

Gerrit-Jan Knaap

Gerrit-Jan Knaap is professor of urban studies and planning, executive director of the National Center for Smart Growth Research and Education, and associate dean for research and creative activity in the School of Architecture, Planning, and Preservation at the University of Maryland. Knaap earned his B.S. from Willamette University, his M.S. and Ph.D. from the University of Oregon, and received post-doctoral training at the University of Wisconsin-Madison, all in economics. Knaap's research interests include housing markets and policy, the economics and politics of land use planning, the efficacy of economic development instruments, and the impacts of environmental policy. On these subjects, Knaap has published over 100 journal articles and seven books. He received the Chester Rapkin award for the best paper published in Volume 10 of the Journal of Planning Education and Research, with Greg Lindsey he received the 1998 best of ACSP award, and in 2006 he received the Outstanding Planner Award from the Maryland Chapter of the American Planning Association. Knaap serves on the Maryland State Smart Growth Subcabinet and Sustainable Growth Commission.